Wavelength/frequency Intensity Location/position of source Reflects off some materials Refracted (bent) moving through other materials
Eyes categorize wavelength into relative intensities within wavelength bands RGB ~ Red, Green, Blue Long, medium, short wavelengths Color is a neural/psychological construct
Cornea - refraction (2/3 of total) Pupil - light intensity; diameter regulated by Iris. Lens - refraction (remaining 1/3; focus)
Retina - light detection ~ skin or organ of Corti Pigment epithelium - regenerate photopigment Muscles - move eye, reshape lens, change pupil diameter
Image inverted (up/down) Image reverseed (left/right) Point-to-point map (retinotopic) Binocular and monocular zones
Central 1-2 deg of visual field Aligned with visual axis Retinal ganglion cells pushed aside Highest acuity vision == best for details
Outer segment Membrane disks Photopigments Inner segment Synaptic terminal Light hyperpolarizes photoreceptor! The dark current